pay-for-http-request

작성자: stripe

purl 명령줄 인터페이스를 사용하여 자동 x402 결제 지원으로 HTTP 요청을 만듭니다.

npx skills add https://github.com/stripe/purl --skill pay-for-http-request

pay-for-http-request

Make HTTP requests with automatic x402 payment support using purl.

Description

This skill enables making HTTP requests to payment-gated APIs using purl, a curl-like CLI tool that automatically handles x402-based payments on EVM and Solana networks.

When to Use This Skill

When an API returns HTTP 402 (Payment Required) and supports the x402 payment protocol, purl can automatically negotiate and execute the payment to access the resource.

Common Scenarios

Scenario	Example
Tool calls	Paying per request to an API service
Premium data feeds	Accessing real-time market data, weather, or analytics
Content monetization	Paying to access paywalled articles or media
Compute resources	On-demand access to compute or storage services

When NOT to Use

Regular HTTP requests that don't require payment (use curl instead)
APIs using traditional payment methods (credit cards, API keys with billing)

Usage

purl <URL> [OPTIONS]
purl <COMMAND>

Commands

Command	Description
`wallet`	Manage wallets (keystores)
`config`	Manage configuration
`balance`	Check wallet balance
`inspect`	Inspect payment requirements without executing
`networks`	Manage and inspect supported networks
`version`	Show version information
`completions`	Generate shell completions script
`topics`	Display help topics (exit-codes, formatting, examples, environment)

Request Options

Payment Options

Option	Description
`--max-amount <AMOUNT>`	Maximum amount willing to pay (in atomic units)
`--confirm`	Require confirmation before paying
`--network <NETWORKS>`	Filter to specific networks (comma-separated)
`--dry-run`	Preview payment without executing

Display Options

Option	Description
`-v, --verbosity`	Verbosity level (can be used multiple times: -v, -vv, -vvv)
`-q, --quiet` / `-s, --silent`	Do not print log messages
`-i, --include`	Include HTTP headers in output
`-I, --head`	Show only HTTP headers
`-o, --output <FILE>`	Write output to file
`--output-format <FORMAT>`	Output format: auto, text, json, yaml (auto detects: text for terminal, json for pipes)
`--color <MODE>`	Control color output: auto, always, never

HTTP Options

Option	Description
`-X, --request <METHOD>`	Custom request method
`-H, --header <HEADER>`	Add custom header
`-A, --user-agent <AGENT>`	Set user agent
`-L, --location`	Follow redirects
`--connect-timeout <SECONDS>`	Connection timeout in seconds
`-m, --max-time <SECONDS>`	Maximum time for the request
`-d, --data <DATA>`	POST data
`--json <JSON>`	Send JSON data with Content-Type header

Wallet Options

Option	Description
`--wallet <PATH>`	Path to wallet file
`--password <PASSWORD>`	Password for wallet decryption
`--private-key <KEY>`	Raw private key (hex, for EVM; use wallet for better security)

Global Options

Option	Description
`-C, --config <PATH>`	Configuration file path

Wallet Commands

purl wallet <COMMAND>

Command	Description
`list`	List available wallets
`add`	Create a new wallet (interactive)
`show <NAME>`	Show wallet details
`verify <NAME>`	Verify wallet integrity
`use <NAME>`	Set a wallet as the active payment method
`remove <NAME>`	Remove a wallet

Wallet Add Options

Option	Description
`-n, --name <NAME>`	Name for the wallet
`-t, --type <TYPE>`	Wallet type: evm or solana
`-k, --private-key <KEY>`	Private key to import (hex for EVM, base58 for Solana)

Config Commands

purl config [COMMAND]

Command	Description
(none)	Show current config
`get <KEY>`	Get a specific configuration value (supports dot notation)
`validate`	Validate configuration file

Examples

Basic payment request

purl https://api.example.com/premium-data

Preview payment without executing

purl --dry-run https://api.example.com/data

Require confirmation before payment

purl --confirm https://api.example.com/data

Set maximum payment amount

purl --max-amount 10000 https://api.example.com/data

Filter to specific network

purl --network base-sepolia https://api.example.com/data

Verbose output with headers

purl -vi https://api.example.com/data

Save output to file as JSON

purl -o output.json --output-format json https://api.example.com/data

POST request with JSON data

purl --json '{"key": "value"}' https://api.example.com/data

Custom headers

purl -H "Authorization: Bearer token" https://api.example.com/data

Follow redirects with custom method

purl -L -X POST https://api.example.com/data

Check wallet balance

purl balance
purl balance --network base

Inspect payment requirements

purl inspect https://api.example.com/endpoint

Wallet management

purl wallet add                      # Interactive wallet creation
purl wallet add --type evm           # Skip type selection
purl wallet add --type solana -k KEY # Import existing key
purl wallet list                     # List all wallets
purl wallet use my-wallet            # Switch active wallet

View supported networks

purl networks
purl networks info base

Supported Networks

Type	Networks
EVM	ethereum, ethereum-sepolia, base, base-sepolia, avalanche, avalanche-fuji, polygon, arbitrum, optimism
SVM	solana, solana-devnet

Prerequisites

Create a wallet: purl wallet add
Set up a payment method (wallet) with funds on the desired network
Ensure the target API supports x402 payment protocol

Environment Variables

Variable	Description
`PURL_MAX_AMOUNT`	Default maximum amount willing to pay
`PURL_NETWORK`	Default network filter
`PURL_CONFIRM`	Default confirmation behavior (true/false)
`PURL_KEYSTORE`	Default wallet/keystore path
`PURL_PASSWORD`	Wallet password (for non-interactive use)